ASBESTOS ABATEMENT ON ROUTE 93N - SALEM, NH
Bridges built in New Hampshire between 1958 and 1978 were built with a waterproofing membrane that contained asbestos. This waterproofing was put in place to protect and preserve the concrete portion of the bridge which is located underneath the asphalt.
New Hampshire's Department of Transportation knows it has many bridges that fall into this category and has begun to address them. Dec-Tam was part of a team of consultants and contractors who worked on the state's first bridge on Route 93 North in Salem, NH. This was a test case to uncover best practices, procedures and to devise a plan to address the remaining bridges.
On this project, Dec-Tam established a regulated work area and implemented environmental controls. This aspect of job was particularly interesting because the work area was only about 4 feet wide. It was adjacent to the active highway, located between the concrete barriers and the bridge railing. The highway remained completely open for the duration of the project. To remove the asbestos containing material, six inches of pavement and curbing were removed, and the waterproofing was scraped and ground from the adjacent concrete. The project took approximately one week.« Back to Case Studies
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